package com.java.system.config;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.java.system.utils.JwtUtil;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;


public class JWTInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        Map<String, Object> map = new HashMap<>();
        //令牌建议是放在请求头中，获取请求头中令牌
        String token = request.getHeader("BASE_TOKEN");
        try {
            JwtUtil.parseJWT(token);//验证令牌
            return true;//放行请求
        } catch (Exception e) {
            e.printStackTrace();
            map.put("msg", "token失效");
        }
        map.put("state", false);//设置状态
        //将map转化成json，response使用的是Jackson
        String json = new ObjectMapper().writeValueAsString(map);
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().print(json);
        return false;

    }
}

